JP2005319410A - Structure of filter bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a filter bag that increases a filtration area effectively while suppressing a cost and enhances a filtration efficiency and a product life. <P>SOLUTION: A pair of filter bags are structured by constituting a support 1 which is a hollow basket-like structure by arranging a plurality of bars 11 at a constant position by supporting and fixing the bars to fixed recessed parts formed on mountain parts of a plurality of locating rings 3, covering the outer periphery of the support 1 by a filter medium 2 folded in pleats and installing top and bottom covers 6, 7 at both the ends of the support 1. The filter bag effectively increases the filtration area of the filter medium 2 which is a cloth having gas permeability and simultaneously making each folded line 21, 22 of the filter medium not to become a dead angle. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

    The present invention relates to a structure of a filter bag, and particularly relates to a filter facility applied to various industrial dust collection systems having an extended filtration area and life and excellent filtration effect.

Substances that cause air pollution can be roughly divided into particulate and gaseous substances, but there are mainly three methods for controlling air pollutants.
First of all, it is the most primitive method, that is, a method such as increasing the height of the chimney or installing a factory in a place avoiding densely populated places, etc. However, it only solves the problem of air pollution in the vicinity of the factory, and is not effective because the total amount of pollutants released into the atmosphere does not change. In particular, gaseous SO ₂ can reach thousands of kilometers away, causing acid rain.
Then, as a second method, there is a method in which a part of the pollutant is removed and then released into the atmosphere by providing a control facility for dealing with the polluted gas before releasing the pollutant. With this control device, the concentration of released pollutants is set to be lower than the legally stipulated standard value, and the removed pollutants are recovered while preventing the air quality standard from being greatly affected. May be reused.
The third method is currently considered to be the most effective method, but it does not generate air pollutants or minimizes the concentration of pollutants generated by changing the production method and process. Is the method. However, this method causes another problem such as high production costs.

  As described above, in order to effectively prevent air pollution, it is necessary to combine the two points of not increasing the production cost and being excellent in the effect of removing contaminants. Therefore, it can be said that among the above-mentioned three parties, the second method, that is, the method of removing contaminants before releasing the contaminants is most preferable. The control equipment mentioned above refers to the treatment and control equipment for particulate and gaseous pollutants, but in order to remove particulate pollutants, especially gravity and inertia, centrifugal force and diffusion phenomenon, sound waves and The method using static electricity is the mainstream, and particulates in the gas are separated and collected and reused or disposed of. A common example of such equipment is a dust collector using a filter bag. This is mainly because the contaminated gas passes through the dust collector, so that fine particles are isolated from the outside world and clean gas. It is a mechanism that can be obtained.

  The filter bag has a shape such as a rectangle or a cylinder depending on the shape of the dust collector. Moreover, in the filtration effect, the filter medium is a key point, but the known filter bag is divided into a hard type and a soft type, and the hard type is manufactured by a molding foam having excellent air permeability. The structure is hard and wear-resistant, and at the same time has many advantages such as easy cleaning, long life, and excellent filtration effect. However, the price is very expensive. In the soft type, paper, cloth or non-woven fabric excellent in air permeability is used as a main material, and there is an advantage that it is easy to adapt to various shapes of the dust collector and is inexpensive. However, since the filtration area is limited to a certain level, it is inferior to the hard type in terms of filtration effect and life, so as a solution, the filtration area covering the frame can be reduced by pleating. It is increasing.

The disadvantages of the known filter bags as described above are listed below.
Although the filtration area is increased by being folded into a pleat shape, paper that is thin and folded and is easy to shape is suitable for actual use. Since it sometimes receives wind pressure, it can be said that it is inferior in wear resistance and has a short life.
In addition, the folds of the filter material folded into pleats have crease corners, which look like gears as a whole, but each corner becomes a blind spot and dust and fine particles during filtration tend to accumulate in the corners. There is a problem that it is hard to fall off, causing clogging. Moreover, since it receives wind pressure, dust and fine particles cause friction with a blind spot formed in the filter material, which is a cause of shortening the service life.
When non-woven fabric is used, it has a longer life compared to paper-made ones, but the non-woven fabric is soft and thick, so it is difficult to fold and form, and even if folded, it will be loose. Cheap. Although it is certain that the filter bag made of a known non-woven fabric has a longer lifetime than that made of paper, it is extremely difficult to fold it into a pleat shape even if it is easy to form into a cylindrical shape for manufacturing. Therefore, the filterable area is small, and it is necessary to replace frequently, or when manufacturing the dust collector, the dust collector needs to be large.
Therefore, in view of the above-described drawbacks, the filter bag structure of the present invention is provided in order to effectively increase the filtration area while suppressing cost and to enhance the filtration efficiency and life.

    The outer periphery of a support column provided with a plurality of bars at intervals is covered with a filter material folded in a pleat shape, and the support column is provided on a plurality of stereotactic rings, so that the filtration is performed by a hollow cage structure. A set of filter bags is constructed by positioning the material and fixing both ends of the column with two positioning pieces and upper and lower lids, and the upper lid is provided with an inlet and connected to a facility for discharging air The stereotactic ring is a piece having a gear shape, and a plurality of crests protruding at equal intervals are provided outside the stereotaxic ring, and a trough is provided at a location facing the crest A base plate for connecting the valleys and the valleys is provided below the valleys, and a support fixing part is further provided at the uppermost end of the peaks to provide a place for fitting the rod, The stereotaxic ring is installed sideways with respect to the column, and a cloth with air permeability is put on the filter medium. A cloth having air permeability that is folded into a pleat shape by folding it into a pleat shape, fixing the inner fold line in correspondence with the valley of the stereotaxic ring, and supporting the outer fold line with the rod. The filter area of a certain filter medium is effectively increased, and a blind spot is not generated by a broken line, and air containing dust and fine particles is effectively filtered.

  According to the present invention, the filtration material is increased by fixing the filter medium made of nonwoven fabric excellent in abrasion resistance in a pleated state on the stereotaxic ring, and at the same time, the fold line of the filter medium is fixed by the anchor member. By doing so, we succeeded in achieving the objectives that the surface was firmly stretched and fine particles did not adhere to the blind spots.

As shown in FIG. 1 to FIG. 4, in the first embodiment of the filter bag structure of the present invention, a plurality of rods 11 are mainly fixed to and supported by mountain portions of a plurality of stereotaxic rings to form a bowl-shaped structure. The support | pillar 1 to be formed is provided, The outer side of this support | pillar 1 is coat | covered with the filter material 2 which exhibited the pleat shape.
Further, both ends of the column 1 are provided with fixed pieces 4 and 5 and upper and lower lids 6 and 7, respectively, so that one filter bag 8 is formed. In addition, the upper lid 6 is provided with an intake port 61, which provides a place to be connected to a facility for discharging air.

  As shown in FIG. 2, the stereotactic ring 3 has a gear shape, and the protruding peak portions 31 of the gear protrude at equal intervals, and a valley portion 32 is provided as a portion opposed to the peak portion 31. Is formed. The lower portions of the valley portions 32 are connected to each other by a base plate 33, and the valley portions 32 are provided with perforations 321. The peak portions 31 are also provided with support fixing portions 311 so that the rods 11 are attached. A location for localization is provided, whereby the localization ring 3 is installed laterally spaced from the rod 11 of the column 1.

  Further, the filter medium 2 is a breathable cloth or non-woven fabric, and is folded in a pleated shape (non-woven fabric is optimal). When the filter medium 2 is folded, the inner folding line 21 is bonded and fixed to the valley portion 32 as a portion corresponding to the valley portion 32, or provided at the valley portion 32 of the stereotactic ring 3 by the anchor member 9. It is assumed that the hole 321 is fixed. The outer fold line 22 is supported by the bar 11 and, when assembled, the cloth or non-woven filter medium 2 having the air permeability is folded into a plurality of states, and the filter medium 2 is folded while increasing the filtration area. Eliminate blind spots by the angle that occurs when

  At the time of implementation, an assembly of a dust collection system that is on a cylinder is taken as an example. First, a plurality of rods 11 are sequentially provided in a recessed groove-shaped support fixing portion 311 provided at a peak portion 31 of the plurality of localization rings 3. The cylindrical support column 1 is completed by supporting the rod 11 with the plurality of localization rings 3. Further, the filter medium 2 made of nonwoven fabric or the like is placed on the cylindrical column 1, the inner folding line 21 of the filtering medium 2 is fixed on the perforation 321 provided in the stereotaxic ring 3, and the inner folding line 21 is Open to avoid forming a blind spot for filtration. When the outer fold line 22 of the filter medium 2 is supported by the rod 11, the column 1 covered with the filter medium 2 in a state where the two fixed pieces 4 and 5 whose center is a gear-shaped cavity are opposed to each other vertically. The both ends of the filter medium 2 are fitted and fixed inside the shaped pieces 4 and 5. Finally, the support column 1 is sealed with the upper lid 6 and the lower lid 7 to complete the cylindrical filter bag 8. The completed filter bag 8 of the present invention is connected to a facility for discharging air because the upper lid 6 is provided with the air blowing port 61.

  The filter bag 8 is a pleated cloth (nonwoven fabric), which has better wear and filtration effect than a known paper product, but the upper lid 6 is connected to a facility for discharging air. When the facility is activated, the filter bag 8 becomes a sealed space, dirty air containing dust and fine particles is isolated by a cloth (nonwoven fabric), and only clean air is extracted from the inlet 61 of the upper lid 6. Is done.

  The shape of the filter bag 8 is set to a desired shape depending on the type of the dust collector. For example, as shown in FIGS. 5 and 6, the filter bag 81 can be designed as a flat hollow shape so that the structure folded in a pleat shape remains as it is. Provides a filtering effect that eliminates blind spots.

In the above-described embodiment, the stereotactic ring 3 is integrally formed. However, as shown in FIGS. 7 and 8, when it is in a cylindrical state, it is shaped like a sun (see FIG. 2) or a flat tube. In some cases, the stereotactic ring 3 may be composed of a large number of stereotactic ring units 34 so as to be applicable to a case of a substantially rectangular shape (see FIG. 6).
Specifically, the stereotaxic ring unit 34 has three peak portions 341, and the shape of the peak portion 341 has an A shape, and connection ends 344 and 345 having holes 343 are provided on both sides of the substrate 342. It is done. Further, the substrate 342 is designed in two types, a circular arc shape and a linear shape, depending on the shape of the filter bag 8 having a different shape, and the thickness of the pair of connection ends 344 and 345 is determined as follows. It is equal to the thickness of the substrate 342, and the number of the positioning ring units 34 is increased or decreased when assembling so that it can be adapted to various kinds of dust collectors.

It is a three-dimensional external appearance exploded view of the Example in this invention. It is a three-dimensional external view of a stereotactic ring in the present invention. It is a three-dimensional external view of the Example in this invention. FIG. 4 is a local sectional view in FIG. 3. It is a three-dimensional external view in case the filter bag in this invention is a flat cylinder. FIG. 6 is a local sectional view in FIG. 5. It is a three-dimensional external view of a stereotaxic ring unit having a circular arc-shaped substrate. It is a three-dimensional external view of a stereotactic ring unit having a substrate that exhibits a straight line.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Support | pillar 11 Rod 2 Filter material 21 Inner folding line 22 Outer folding line 3 Stereotaxic ring 31 Mountain part 311 Support fixing part 32 Wave 321 Perforation 33 Substrate 34 Stereotaxic ring unit 341 Mountain part 342 Substrate 343 Hole 344 Connection end 345 Connection end 4 Fixed piece 5 Fixed piece 6 Upper lid 61 Air inlet 7 Lower lid 8 Filter bag 81 Filter bag 9 Anchor member

Claims (8)

A hollow bowl-like structure is formed in which a plurality of rods are spaced apart by a plurality of stereotactic rings, and the outer periphery of the structure is covered with a filter material folded in a pleat shape, and both ends of the column are fixed to a stereotaxic piece and upper and lower lids And a filter bag that is fixed to the upper lid and connected to a facility for discharging air by providing an air inlet in the upper lid,
The stereotaxic ring is provided with a plurality of crests and a trough corresponding to the crests, and the troughs and troughs are provided below the troughs. And a support fixing part for inserting the rod at the tip of the peak part,
The filter medium is formed by folding a cloth having air permeability into a pleat shape, fixing an inner fold line to a valley portion of the stereotaxic ring, and supporting an outer fold line by the rod. A filter bag structure characterized by effectively increasing the filtration area of a filter medium, which is a cloth having a filter, and at the same time, avoiding blind spots in each fold line.   2. The filter bag structure according to claim 1, wherein the air-permeable cloth is a non-woven fabric.   2. The structure of a filter bag according to claim 1, wherein the stereotactic ring is integrally molded.   2. The structure of the filter bag according to claim 1, wherein a perforation is provided in a valley portion of the stereotaxic ring, and a portion for fixing an inner folding line portion of the filter medium by an anchor member is provided.   The filter bag according to claim 1, wherein the two fixed pieces are provided with an installation portion exhibiting a gear-shaped opening, and provide a location for positioning both ends of the filter medium. Structure.   The stereotaxic ring is composed of a number of stereotaxic ring units, and has three peaks and two valleys on the stereotaxic ring unit, and the peaks have a substantially A-shape. 2. A connection end having a hole is provided on both sides of the substrate, and the thickness when the two connection ends are connected to each other is equal to the thickness of the base portion. The structure of the filter bag.   The structure of the filter bag according to claim 6, wherein the stereotactic ring unit has a linear shape, and the post after assembly is assembled in a cylindrical shape having a substantially rectangular shape. The filter bag structure according to claim 6, wherein the substrate of the stereotactic ring unit has an arc shape, and the pillars after assembly are assembled in a cylindrical shape.

Images